ET DOS Possible Memcached DDoS Amplification Query (set)

Query · suricata

content:"|00 00 00 00 00 01 00|"; depth:7; fast_pattern;
content:"|0d 0a|"; within:20; endswith;
threshold:type both, count 100, seconds 60, track by_dst;
flowbits:set,ET.memcached.ddos;

Rule dependencies

Feeds into

  • 1 rule read ET.memcached.ddos · view all
Raw source ET DOS Possible Memcached DDoS Amplification Query (set) · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert udp $EXTERNAL_NET any -> any 11211 (
    msg:"ET DOS Possible Memcached DDoS Amplification Query (set)";
    content:"|00 00 00 00 00 01 00|"; depth:7; fast_pattern;
    content:"|0d 0a|"; within:20; endswith;
    threshold:type both, count 100, seconds 60, track by_dst;
    flowbits:set,ET.memcached.ddos;
    reference:url,blog.cloudflare.com/memcrashed-major-amplification-attacks-from-port-11211/;
    classtype:attempted-dos;
    sid:2025401; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Linux, attack_target Server, created_at 2018_03_01, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_19;
)

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